Pressure sensitivity relief for photographic products

U.S. Patent Number: 5393650

Abstract: This invention describes the use of surfactants of the following types: Type A--Surfactant comprising 6 to 22 carbon atom hydrophobic tail with one or more attached hydrophilic chains comprising at least 8 oxyethylene and/or glycidyl ether groups that may or may not be terminated with a negative charge such as a sulfate group. Type B--Block oligomeric surfactants comprising hydrophobic polyoxypropylene blocks (A) and hydrophilic polyoxyethylene blocks (B) joined in the manner of A--B--A, B--A--B, A--B, (A--B.sub.n .tbd.G.tbd.(B--A).sub.n, or (B--A).sub.n .tbd.G(A--B).sub.n, where G is a connective organic moiety and n is between 1 and 3. Type C--Sugar surfactants, comprising between one to three 6 to 22 carbon atom hydrophobic tail with one or more attached hydrophilic mono or oligosaccharidic chains that may or may not be terminated by a negatively charged group such as a sulfate group. in combination with gelatin-grafted-polymer particles to obtain aggregation and defect free photographic multilayer coatings that are considerably low in pressure sensitivity.

Inventors: Bagchi; Pranab (Webster, NY), Kestner; Melvin M. (Hilton, NY)

Assignee: Eastman Kodak Company (Rochester, NY)

Application Number: 08/265,997

Issued: 1995-02-28

Expired: 2007-02-28

Classes: 430/523 ; 430/138; 430/531; 430/536; 430/545

Field of search: 430/138,523,531,536,545,621,627

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